▎ 摘　　要

NOVELTY - Preparing molybdenum-cobalt/graphene composite hydrogen evolution catalytic material comprises e.g. preparing graphene oxide by using improved Hummers method, adding certain amount of dihydrate sodium molybdate, hexahydrate cobalt nitrate, thiourea and oxidized graphene into de-ionized water, stirring, using ultrasonic to dissolve, transferring to a reaction kettle at a certain temperature, reacting for a certain time, obtaining molybdenum-cobalt/graphene composite, and preparing disulfide- cobalt/graphene composite hydrogen evolution catalytic material of molybdenum-cobalt/graphene composite. USE - The catalytic material is useful for electro-catalyzing hydrogen evolution (claimed). ADVANTAGE - The method: is simple; has low energy consumption; is economical; and is suitable for industrial production. The material: has high electron transport rate; and has good hydrogen separation performance. DETAILED DESCRIPTION - Preparing molybdenum-cobalt/graphene composite hydrogen evolution catalytic material comprises (i) preparing graphene oxide by using improved Hummers method, (ii) adding a certain amount of dihydrate sodium molybdate, hexahydrate cobalt nitrate, thiourea and oxidized graphene into the de-ionized water, stirring, using ultrasonic to dissolve, transferring to a reaction kettle at a certain temperature, reacting for a certain time, obtaining molybdenum-cobalt/graphene composite, and (iii) preparing disulfide- cobalt/graphene composite hydrogen evolution catalytic material in the step (ii) of molybdenum-cobalt/graphene composite, respectively using de- ionized water and ethanol washing and centrifugating to remove inorganic and organic impurities, washing and centrifuging of molybdenum-cobalt/graphene composite in the refrigerator, pre-freezing at a temperature for a period of time, placing the pre-processed sample in a freeze drier, freeze drying at a certain temperature for a period of time, freezing and drying, grinding into powder, and obtaining the molybdenum-cobalt/graphene composite hydrogen evolution catalytic material.